Toyo Pulp Co., Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4486394 Alkali regeneration processExpiredNov 01, 83Dec 04, 84[C01D]
4383890 Ceramic sheet and method for producing the sameExpiredMar 02, 81May 17, 83[D21H]
4297402 Packaging bagExpiredApr 18, 80Oct 27, 81[B65D, B32B]
4274913 Process for producing alkali pulpExpiredMay 22, 79Jun 23, 81[D21C]
4232720 Round log material and method of producing the sameExpiredNov 19, 76Nov 11, 80[A01G]
4184526 Disc-shaped chipper with detachable cutting membersExpiredJun 20, 77Jan 22, 80[B27G]

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